Tillage and haymaking practices speed up belowground net productivity restoration in the degraded Songnen grassland

摘要: Abstract The improvement of productivity and soil organic matter is a central issue for the restoration degraded land. Belowground net primary (BNPP) major source matter. Therefore, understanding BNPP dynamics crucial to improving our knowledge belowground C allocation storage in grasslands. However, how tillage haymaking practices affect remains poorly understood. To investigate effects on root fraction ( f ), field experiment set within three fenced areas, one each maize cultivation, artificial grassland, natural was carried out during 2012–2014. treatments were: tillage; no-tillage, keeping residues; removing no haymaking; haymaking. ingrowth donuts method used determine BNPP. Across years, varied from 220 1331 g m −2 . Tillage significantly increased cultivation grassland managements, respectively, suggesting that more allocated with those land-use practices. On average, ranged 0.25 0.54 higher 2014 than 2012 2013, irrespective practices, indicating precipitation controlling factor determining between aboveground. Our findings highlight can enhance allocation. perspective whole plant, they should be considered as feasible management grassland.